WO2020184875A1 - Procédé de sélection de nombre de dents utilisant une image panoramique et dispositif de traitement d'image médicale associé - Google Patents

Procédé de sélection de nombre de dents utilisant une image panoramique et dispositif de traitement d'image médicale associé Download PDF

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WO2020184875A1
WO2020184875A1 PCT/KR2020/002892 KR2020002892W WO2020184875A1 WO 2020184875 A1 WO2020184875 A1 WO 2020184875A1 KR 2020002892 W KR2020002892 W KR 2020002892W WO 2020184875 A1 WO2020184875 A1 WO 2020184875A1
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Prior art keywords
tooth number
tooth
panoramic image
data
crown
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PCT/KR2020/002892
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English (en)
Korean (ko)
Inventor
최규옥
조상형
김효정
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오스템임플란트 주식회사
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Publication of WO2020184875A1 publication Critical patent/WO2020184875A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B34/00—Computer-aided surgery; Manipulators or robots specially adapted for use in surgery
    • A61B34/10—Computer-aided planning, simulation or modelling of surgical operations
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/50—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment specially adapted for specific body parts; specially adapted for specific clinical applications
    • A61B6/51—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment specially adapted for specific body parts; specially adapted for specific clinical applications for dentistry
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/52—Devices using data or image processing specially adapted for radiation diagnosis
    • A61B6/5211—Devices using data or image processing specially adapted for radiation diagnosis involving processing of medical diagnostic data
    • A61B6/5229—Devices using data or image processing specially adapted for radiation diagnosis involving processing of medical diagnostic data combining image data of a patient, e.g. combining a functional image with an anatomical image
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A61C13/0003—Making bridge-work, inlays, implants or the like
    • A61C13/0004—Computer-assisted sizing or machining of dental prostheses
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C9/00—Impression cups, i.e. impression trays; Impression methods
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C9/00—Impression cups, i.e. impression trays; Impression methods
    • A61C9/004—Means or methods for taking digitized impressions
    • A61C9/0046—Data acquisition means or methods
    • G—PHYSICS
    • G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
    • G16H—HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
    • G16H30/00—ICT specially adapted for the handling or processing of medical images
    • G16H30/40—ICT specially adapted for the handling or processing of medical images for processing medical images, e.g. editing
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B34/00—Computer-aided surgery; Manipulators or robots specially adapted for use in surgery
    • A61B34/10—Computer-aided planning, simulation or modelling of surgical operations
    • A61B2034/101—Computer-aided simulation of surgical operations
    • A61B2034/105—Modelling of the patient, e.g. for ligaments or bones
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B34/00—Computer-aided surgery; Manipulators or robots specially adapted for use in surgery
    • A61B34/10—Computer-aided planning, simulation or modelling of surgical operations
    • A61B2034/107—Visualisation of planned trajectories or target regions
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B34/00—Computer-aided surgery; Manipulators or robots specially adapted for use in surgery
    • A61B34/10—Computer-aided planning, simulation or modelling of surgical operations
    • A61B2034/108—Computer aided selection or customisation of medical implants or cutting guides
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2576/00—Medical imaging apparatus involving image processing or analysis

Definitions

  • the present invention relates to a medical image processing technology.
  • the process of establishing an implant placement plan using a guide design program for dental implant surgery is a preliminary preparation before proceeding with the guide design.
  • the user selects the tooth number to proceed with the surgery plan in advance, and the selected tooth number. It includes the process of loading information such as crowns and fixtures stored in the library from the program.
  • 1 is a view showing a tooth shape image used for selecting a tooth number in a general program.
  • currently commercialized image programs, guide design programs, and patient management programs provide tooth shape images for each tooth number along with tooth numbers so that tooth numbers can be selected.
  • the user can select a tooth number for surgery or treatment from the tooth shape image.
  • the initially selected tooth number needs to be changed to another tooth number. For example, it may be necessary to check the CT data according to the alveolar bone and the patient's oral condition and change the tooth number to be operated from the initially selected tooth number to another tooth number.In this case, the user's modification to change the tooth number Additional work will occur.
  • a method for selecting a tooth number using a panoramic image and a medical image processing apparatus therefor is proposed in order to minimize user modification when selecting a tooth number for surgery or treatment.
  • a method for selecting a tooth number using a panoramic image includes the steps of dividing the panoramic image into tooth regions for each tooth number, and by user manipulation in the panoramic image divided into tooth regions for each tooth number. And selecting a tooth number to be diagnosed or planned for surgery.
  • the method of selecting a tooth number using a panoramic image includes the steps of matching CT data and oral model data, and after completing the registration of the CT data and oral model data, a plane to create an arch line is determined and displayed, and a plane by the user.
  • the steps of determining and displaying a final plane through position and angle adjustment of the plane, generating a arch line in the oral model data and CT data for which the plane is determined, and generating a panoramic image using the created arch line It may further include.
  • the step of dividing into tooth regions for each tooth number includes determining a boundary line or boundary point that is a criterion for crown creation from CT data or oral model data in which the arch line is created, and the position and size ratio of the crown according to the determined boundary line or boundary point. And calculating the position of the fixture so that it has the same reference axis as the calculated crown position, and a panoramic image based on the crown and fixture position calculation results, in the form of the crown and the fixture position, and the tooth area for each tooth number. It may include the step of dividing into.
  • the step of selecting a tooth number includes displaying the tooth number at the position indicated by the cursor by the user's mouse operation in the panoramic image and the tooth region of the tooth number as a virtual graphic object, and a graphic object displayed on the screen. Among them, it may include selecting a tooth number to be diagnosed or planned for surgery by user manipulation.
  • the method of selecting a tooth number using a panoramic image is a user control whether to use the tooth number for implant structure including fixtures or bridge crown design, depending on the purpose of use, when selecting a tooth number from a panoramic image.
  • the step of selecting by and the step of visually dividing and displaying the graphic object of the tooth number selected for the purpose of use may be further included.
  • a medical image processing apparatus includes a tooth region dividing unit for dividing a panoramic image into tooth regions for each tooth number, and a diagnosis or surgery by a user operation in the panoramic image divided into tooth regions for each tooth number. It includes a tooth number selection unit for selecting a tooth number to be planned.
  • the medical image processing apparatus determines and displays a data matching unit for matching CT data and oral model data, and a plane to generate a arch line after completing registration of the CT data and oral model data, and displays the position and angle of the plane by the user.
  • the final plane is determined and displayed through adjustment, and the arch line generator generates an arch line in the oral model data and CT data for which the plane is determined, and a panoramic image that generates a panoramic image using the generated arch line. It may further include a generating unit.
  • the medical image processing apparatus includes a crown generation criterion determining unit that determines a boundary line or boundary point as a crown generation criterion from CT data or oral model data in which a arch line is generated, and a position and size ratio of the crown according to the determined boundary line or boundary It further includes a crown and fixture placement calculator that calculates the position of the fixture so as to have the same reference axis as the calculated crown position, and the tooth region division unit converts the panoramic image to the crown and the crown based on the position calculation result of the fixture.
  • the fixture is located and can be divided into tooth regions for each tooth number.
  • the tooth number selection unit displays the tooth number at the position indicated by the cursor by the user's mouse operation in the panoramic image and the tooth area of the tooth number as a virtual graphic object, and diagnoses or performs surgery among graphic objects displayed on the screen.
  • the tooth number to be planned can be selected by user operation.
  • the medical image processing device selects by user operation whether to use the tooth number for implant structure including fixtures or bridge crown design depending on the intended use. It may further include a tooth use selection unit for visually dividing and displaying the graphic object of the tooth number selected for use according to the use purpose.
  • a tooth number to be operated or treated is selected from a panoramic image, thereby minimizing user modification that may occur in subsequent processes. can do.
  • a tooth number for placing an implant and a tooth number to be designed as a bridge crown can be selected.
  • FIG. 1 is a diagram showing a tooth shape image used for tooth number selection in a general program
  • FIG. 2 is a diagram showing the configuration of a medical image processing apparatus according to an embodiment of the present invention.
  • FIG. 3 is a view showing a detailed configuration of the pre-preparation unit of FIG. 2 according to an embodiment of the present invention
  • FIG. 4 is a view showing an image screen for matching CT data and oral model data according to an embodiment of the present invention
  • FIG. 5 is a diagram illustrating an image screen for determining a plane in which an arch line is to be generated according to an embodiment of the present invention
  • FIG. 6 is a diagram illustrating an image screen representing a plane determined by plane adjustment according to an embodiment of the present invention
  • FIG. 7 is a diagram illustrating an image screen for converting a plane into CT data according to an embodiment of the present invention.
  • FIG. 8 is a diagram illustrating an image screen for determining a crown generation reference region according to an embodiment of the present invention
  • FIG. 9 is a view showing a panoramic image screen in which tooth regions for each tooth number are divided according to an embodiment of the present invention.
  • FIG. 10 is a view showing a panoramic image screen in which tooth regions and tooth numbers for each tooth number are displayed for selecting a tooth number according to an embodiment of the present invention
  • FIG. 11 is a view showing a panoramic image screen for selecting a tooth number according to an embodiment of the present invention.
  • FIG. 12 is a diagram illustrating a method of selecting a tooth number using a panoramic image according to an embodiment of the present invention.
  • Combinations of each block in the attached block diagram and each step in the flowchart may be executed by computer program instructions (execution engines), and these computer program instructions are provided on a processor of a general purpose computer, special purpose computer or other programmable data processing device. As it may be mounted, its instructions executed by the processor of a computer or other programmable data processing device generate means for performing the functions described in each block of the block diagram or each step of the flowchart.
  • These computer program instructions may also be stored in a computer usable or computer readable memory that can be directed to a computer or other programmable data processing device to implement a function in a particular way, so that the computer usable or computer readable memory It is also possible to produce an article of manufacture containing instruction means for performing the functions described in each block of the block diagram or each step of the flow chart.
  • each block or each step may represent a module, segment, or part of code containing one or more executable instructions for executing specified logical functions, and in some alternative embodiments mentioned in the blocks or steps. It should be noted that it is also possible for functions to occur out of order. For example, two blocks or steps shown in succession may in fact be performed substantially simultaneously, and the blocks or steps may be performed in the reverse order of a corresponding function as necessary.
  • FIG. 2 is a diagram showing the configuration of a medical image processing apparatus according to an embodiment of the present invention.
  • the medical image processing apparatus 1 is an electronic device capable of executing a medical image processing program such as a guide design program, a scan program, a CAD program, and a patient management program.
  • Electronic devices include computers, notebook computers, laptop computers, tablet PCs, smartphones, mobile phones, personal media players (PMPs), personal digital assistants (PDAs), and the like.
  • the program may be a guide design program for dental implant surgery.
  • the guide design process includes a preparation step and a guide generation step.
  • the preparation step includes registration of a surgical patient, storage of the registered patient's CT data and oral model data, registration of CT data and oral model data, generation of an arch line from the registration data, and a panoramic image using the arch line. image) creation step.
  • the guide generation step includes determining the position and size of the crown model in the patient's oral model data, determining the position of the implant structure including the fixture in the patient's CT data, designing the guide shape, and outputting the final guide.
  • the present invention is a process of generating a panoramic image using the arch line of the matching data after matching the patient's CT data and the oral model data during the above process, and selecting a tooth number to be treated or operated from the generated panoramic image. Corresponds to.
  • the configuration of the medical image processing apparatus 1 having the above-described characteristics will be described later.
  • a medical image processing apparatus 1 includes a data acquisition unit 10, a storage unit 11, a control unit 12, an input unit 15, and an output unit 16. .
  • the data acquisition unit 10 acquires basic image data. For example, CT data and oral model data are obtained from teeth including the damaged target tooth of the patient.
  • the data acquisition unit 10 executes CT data and oral model data in a program or loads data stored in a web page and a server.
  • the oral model data is data with information on actual teeth including damaged teeth.
  • the oral model data may be obtained by scanning a plaster model created after a patient's mouth with a 3D scanner. As another example, it may be obtained by scanning the inside of the patient's oral cavity using a 3D intra-oral scanner.
  • the obtained oral model data may be stored in the storage unit 11.
  • CT data can be obtained by generating a patient's head tomography images using CT (Computed Tomography, computed tomography), separating the boundary of the tooth from each tomography image, and then combining them into one.
  • These oral model data and CT data are images obtained by photographing the maxillary teeth under the maxillary teeth with the patient's mouth open, the images obtained by photographing the mandibular teeth above the mandibular teeth with the mouth open, and the local area with the mouth closed. Includes images obtained, oral radiographs, etc.
  • the acquired CT data may be stored in the storage unit 11.
  • the storage unit 11 stores information necessary for performing an operation of the medical image processing apparatus 1 and information generated according to the operation.
  • the storage unit 11 stores the oral model data and CT data of an individual patient, and during a dental treatment simulation, the oral model data and CT data of a specific patient among all oral model data and CT data are stored at a user request. Accordingly, it can be provided to the control unit 12.
  • the storage unit 11 stores images of the upper and lower teeth of an individual patient, and images of the upper and lower teeth that match the oral model data and CT data of a specific patient are stored at the user request. Accordingly, it can be provided to the control unit 12.
  • the control unit 12 controls each component while establishing an implant placement plan and designing a guide for surgery through control by a computer program. To this end, the control unit 12 manages screen information displayed on the screen through the output unit 16 and performs a simulation of arranging a virtual fixture object in the image data.
  • the image data on which the virtual fixture object is arranged refers to a multidimensional image, such as 2D or 3D, showing the arrangement of the teeth of a patient created to establish an implant surgery plan.
  • Various types of images such as X-ray, CT, panoramic images, oral scan images, images generated through reconstruction, and images that match multiple images, can be used for implant surgery planning.
  • the control unit 12 includes a preliminary preparation unit 13 and a guide design unit 14.
  • the preliminary preparation unit 13 prepares in advance for implant placement. For example, the preliminary preparation unit 13 registers a patient for surgery, stores CT data and oral model data of the registered patient, matches CT data and oral model data, creates an arch line from the registration data, and creates an arch line. Panoramic image is generated using. Further, the pre-preparation unit 13 divides the panoramic image into tooth regions for each tooth number so that the user can select a tooth number to be treated or operated on from the generated panoramic image. At this time, the shape and tooth number of each tooth number are displayed on the screen as a virtual object in the panoramic image.
  • the user selects a tooth number for surgery or treatment while checking virtual objects for each tooth number displayed on the screen.
  • a tooth number from a panoramic image the user can select whether to use it as a tooth number for placing an implant structure including a fixture or a tooth number for designing a bridge crown, depending on the intended use.
  • the guide design unit 14 determines the position and size of the crown model through simulation in the panoramic image after the tooth number to be treated or operated on the panoramic image is selected through the pre-preparation unit 13, and the implant structure including the fixture. Position determination, guide shape design, final guide output, and surgery plan are established. When establishing the surgery plan, only the shape of the crown may be provided to the tooth number selected for the bridge crown design through the preliminary preparation unit 13 at the stage of the surgery plan. In this case, the user can only perform crown design work, and the function of adjusting implant structures other than the crown including the fixture is not provided.
  • the input unit 15 receives a user manipulation signal. For example, in order to match two image data (CT data and oral model data) displayed on the screen through the output unit 16, feature points, which are reference points for matching, are selected from a plurality of directions for two image data. . Multiple directions are, for example, front, left and right directions.
  • the input unit 15 targets the tooth area for each tooth number displayed as a virtual graphic object on the screen through the output unit 16 through user manipulation, such as clicking a mouse. Choose.
  • the output unit 16 displays a medical image screen.
  • the output unit 16 may display view images corresponding to different directions for each of the two image data (CT data and oral model data) on the divided screen. View images may be classified based on a number of directions, and include, for example, a front view image, a left view image, and a right view image.
  • a user inputs feature points for each of a front view image, a left view image, and a right view image through the input unit 15, a total of three feature points for each image data form a triangular shape.
  • Each view image can be automatically rotated by the controller 12 for data matching.
  • the output unit 16 may display the data matching result on the screen.
  • FIG. 3 is a view showing a detailed configuration of the pre-preparation unit of FIG. 2 according to an embodiment of the present invention.
  • the preliminary preparation unit 13 includes a data matching unit 130, a arch line generation unit 131, a panoramic image generation unit 132, a crown generation criterion determination unit 133, It includes a crown and fixture arrangement calculation unit 134, a tooth region division unit 135, a tooth number selection unit 136, and a tooth usage selection unit 137.
  • the data matching unit 130 matches CT data and oral model data.
  • the arch line generation unit 131 After the registration of the CT data and the oral model data is completed, the arch line generation unit 131 generates a arch line in the CT data and the oral model data. For example, the arch line generation unit 131 determines and displays the plane in which the arch line is to be generated, after the CT data and the oral model data are matched, and the final plane through the position and angle adjustment of the plane by the user. Is determined and displayed. Accordingly, an arch line may be generated in the oral model data and CT data for which the plane is determined.
  • the panoramic image generation unit 132 generates a panoramic image using the arch line generated by the arch line generation unit 131.
  • the tooth region dividing unit 135 divides the panoramic image generated through the panoramic image generating unit 132 into tooth regions for each tooth number. In this case, an image of a tooth shape may be provided for each divided tooth number.
  • the crown generation criterion determination unit 133 and the crown and fixture arrangement calculation unit 134 may be used to divide a tooth region for each tooth number in the panoramic image.
  • the crown generation criterion determining unit 133 determines a boundary line or a boundary point serving as a crown generation criterion from CT data or oral model data in which the arch line is generated.
  • the crown and fixture placement calculation unit 134 calculates the position and size ratio of the crown according to the boundary line or boundary point determined through the crown generation criterion determination unit 133 and calculates the position of the fixture to have the same reference axis as the calculated crown position. do.
  • the tooth region dividing unit 135 divides the panoramic image into tooth regions for each tooth number in a shape in which the crown and fixtures are located based on the position calculation result of the crown and fixture arrangement calculation unit 134.
  • the tooth number selection unit 136 selects a tooth number to be diagnosed or planned for surgery by user manipulation from a panoramic image divided into tooth regions for each tooth number.
  • the tooth number selection unit 136 according to an embodiment displays a tooth number at a position indicated by a cursor and a tooth region of the tooth number as a virtual graphic object by a user's mouse manipulation on the panoramic image screen. In this case, among graphic objects displayed on the screen, a tooth number to be diagnosed or planned for surgery may be selected by user manipulation.
  • the tooth use selection unit 137 classifies and selects the tooth number according to the intended use. For example, whether to use a tooth number to place an implant structure including a fixture (hereinafter, a tooth number for placing an implant structure) (implant), or a tooth number to be designed as a bridge crown (hereinafter, a tooth number for a bridge crown design) ( Bridge) is selected by user operation.
  • the graphic object of the selected tooth number may be visually classified and displayed according to the purpose of use.
  • the tooth number for implant structure placement and the tooth number for bridge crown design may be distinguished by displaying different colors.
  • FIG. 4 is a diagram illustrating an image screen for matching CT data and oral model data according to an embodiment of the present invention.
  • the program matches patient CT data 410 and oral model data 420.
  • Data matching refers to a process of displaying CT data 410 and oral model data 420 acquired in different ways in the same coordinate system.
  • an arch line may be generated for the CT data 410 and the oral model data 420 in which the positions are matched, and a panoramic image may be generated using the generated arch line.
  • the oral model data 420 includes both data obtained by scanning the patient's gypsum model and data directly scanning the patient's mouth.
  • the arch line can be generated using only the patient's CT data 410, the CT data 410 is used to generate the arch line while simultaneously checking the tooth shape in the CT data 410 and the oral model data 420.
  • the oral model data 420 are first matched so that they have the same location information. Even if a tooth number is selected from a panoramic image generated using only the CT data 410 without performing data matching, the method of selecting a tooth number is the same.
  • FIG. 5 is a diagram illustrating an image screen for determining a plane in which an arch line is to be generated according to an embodiment of the present invention.
  • the program determines a plane in which the arch line is to be generated, as shown in FIG. 5.
  • the initial position of the plane is automatically displayed by the program, and the position and angle of the plane can be selectively adjusted by the user.
  • FIG. 5 shows an example in which a user adjusts the position and angle of a plane through rotation and movement in the three-dimensional CT data 410.
  • FIG. 6 is a diagram illustrating an image screen representing a plane determined by plane adjustment according to an embodiment of the present invention.
  • the adjusted plane 420 is positioned at the arch line generated by the user manual method or the automatic method using the algorithm of the program, as shown in FIG. It is used as a flat surface.
  • FIG. 7 is a diagram illustrating an image screen for converting a plane into CT data according to an embodiment of the present invention.
  • the arch line generation method includes a manual method in which a user directly creates an arch line, a method in which a program automatically generates an arch line, and a semi-automatic method in which a user receives some input and uses it to generate an entire arch line.
  • FIG. 8 is a diagram illustrating an image screen for determining a reference region for generating a crown according to an embodiment of the present invention.
  • the program generates a arch line using both CT data and oral model data, and then determines a crown generation reference region 450.
  • the crown generation reference region 450 may be a region in the distal direction of both teeth 7 present at a symmetrical position with respect to the midline on the arch line as illustrated in FIG. 8.
  • the program calculates the center position and size ratio of the crown according to the crown generation reference area 450. Then, the position of the fixture is calculated so that the position has the same reference axis as the determined crown. Note that at this time, the crown and fixture are not displayed on the panoramic image. The crown and fixture positions are to be recognized only in the program, so that the tooth number can be selected as an area.
  • FIG. 9 is a diagram illustrating a panoramic image screen in which tooth regions for each tooth number are divided according to an embodiment of the present invention.
  • a panoramic image 440 is formed in a form in which the crown and fixture are located by reflecting the crown and fixture positions calculated based on the crown generation reference region 450. It is divided into tooth regions 460 for each tooth number.
  • FIG. 10 is a diagram illustrating a panoramic image screen in which tooth regions and tooth numbers for each tooth number are displayed for selecting a tooth number according to an embodiment of the present invention.
  • a graphic object 470 representing the shape and tooth number of the tooth number region is displayed on the screen.
  • FIG. 11 is a diagram illustrating a panoramic image screen for selecting a tooth number according to an embodiment of the present invention.
  • a tooth number selected by a user and a tooth region of the tooth number are displayed on a panoramic image.
  • the usage of the selected tooth number can be additionally selected.
  • it is classified into a tooth number (implant) for placing an implant structure including a fixture and a tooth number (Bridge) for a bridge crown design, so that the user can select it.
  • a tooth number for placing an implant structure including a fixture
  • a tooth number for a bridge crown design
  • There are many ways to choose For example, if the user clicks the tooth number where the mouse cursor is positioned once, it is selected for implant structure placement (Implant) 480, and if the user clicks twice, it is selected as the bridge crown design (Bridge) 490.
  • the selection method may be other than the above-described mouse click.
  • the implant structure implantation tooth number (Implant) 480 may be expressed to be visually distinguished from each other in a bridge crown design tooth number (Bridge) 490 and a panoramic image. For example, colors or shapes can be expressed differently.
  • the legend 500 defining the purpose of use may be additionally displayed on the screen.
  • the implant structure including the crown and the fixture is expressed on the tooth image, and a user adjustment function is provided.
  • the tooth number selected for the bridge crown only the shape of the crown is provided in the operation planning stage, so that the user can only proceed with the crown design work, and the function of adjusting implant structures other than the crown including the fixture is not provided.
  • FIG. 12 is a diagram illustrating a method of selecting a tooth number using a panoramic image according to an embodiment of the present invention.
  • the medical image processing apparatus 1 generates a panoramic image through a program (S1200).
  • S1200 An example of generating a panoramic image is as described above with reference to FIGS. 4 to 8, but a method of generating a panoramic image is not limited thereto.
  • the medical image processing apparatus 1 divides the panoramic image into tooth regions for each tooth number (S1210).
  • a boundary line or boundary point which is a criterion for creating a crown
  • the position and size ratio of the crown is calculated according to the determined boundary line or boundary point, and the position of the fixture is calculated to have the same reference axis as the calculated crown position.
  • the panoramic image is divided into tooth regions for each tooth number in the form where the crown and fixture are located.
  • the medical image processing apparatus 1 selects a tooth number to be diagnosed or planned for surgery by a user operation from the panoramic image divided into tooth regions for each tooth number (S1220).
  • a tooth number at a position indicated by the cursor and a tooth region of the corresponding tooth number may be displayed as a virtual graphic object in the panoramic image by the user's mouse manipulation.
  • a tooth number to be diagnosed or planned for surgery may be selected by user manipulation.
  • the medical image processing apparatus 1 may additionally select the usage of the selected tooth number and visually divide and display the tooth number according to the selected usage (S1230). For example, when selecting a tooth number from a panoramic image, depending on the purpose of use of the selected tooth number, whether to use it as a tooth number for implant structure placement including a fixture or a tooth number for bridge crown design is selected by user manipulation. do.
  • the graphic object of the tooth number selected for use can be visually classified and displayed according to the purpose of use.

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  • Health & Medical Sciences (AREA)
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  • Veterinary Medicine (AREA)
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  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Epidemiology (AREA)
  • Dentistry (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Radiology & Medical Imaging (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
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  • Apparatus For Radiation Diagnosis (AREA)

Abstract

L'invention concerne un procédé de sélection de nombre de dents utilisant une image panoramique et un dispositif de traitement d'image médicale associé. Un procédé de sélection de nombre de dents utilisant une image panoramique, selon un mode de réalisation, comprend les étapes consistant : à diviser une image panoramique en zones dentaires par nombre de dents; à sélectionner, au moyen d'une opération d'utilisateur, un nombre de dents à diagnostiquer ou sur lesquelles une opération chirurgicale doit être effectuée dans l'image panoramique divisée en zones dentaires par nombre de dents.
PCT/KR2020/002892 2019-03-12 2020-02-28 Procédé de sélection de nombre de dents utilisant une image panoramique et dispositif de traitement d'image médicale associé WO2020184875A1 (fr)

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KR1020190028211A KR102236359B1 (ko) 2019-03-12 2019-03-12 파노라믹 영상을 이용한 치아번호 선택방법 및 이를 위한 의료영상 처리장치
KR10-2019-0028211 2019-03-12

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KR102496449B1 (ko) 2021-12-29 2023-02-07 이마고웍스 주식회사 치아 바운더리 커브를 이용한 3차원 스캔 데이터의 치아 자동 분리 방법 및 이를 컴퓨터에서 실행시키기 위한 프로그램이 기록된 컴퓨터로 읽을 수 있는 기록 매체
KR102536834B1 (ko) * 2022-08-17 2023-05-26 주식회사 인비전랩 인공지능을 이용한 치아번호 식별 방법 및 치아 상태 판독문 생성 방법

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